Light modulators based on polymer-dispersed ferroelectric liquid crystals

1996 ◽  
Author(s):  
S. L. Smorgon ◽  
V. Y. Zyryanov ◽  
V. F. Shabanov ◽  
Eugene P. Pozhidaev
Keyword(s):  
Liquid Crystals ◽  
Ferroelectric Liquid Crystals ◽  
Light Modulators ◽  
Polymer Dispersed

scholarly journals Helix-Free Ferroelectric Liquid Crystals: Electro Optics and Possible Applications

2018 ◽  
Vol 8 (12) ◽  
pp. 2429 ◽  
Author(s):  
Alexander Andreev ◽  
Tatiana Andreeva ◽  
Igor Kompanets ◽  
Nikolay Zalyapin
Keyword(s):  
Liquid Crystals ◽  
Low Voltage ◽  
Light Transmission ◽  
Optical Response ◽  
Phase Delay ◽  
High Rate ◽  
Ferroelectric Liquid Crystals ◽  
Light Modulators ◽  
Director Reorientation ◽  
Smooth Dependence

This is a review of results from studying ferroelectric liquid crystals (FLCs) of a new type developed for fast low-voltage displays and light modulators. These materials are helix-free FLCs, which are characterized by spatially periodic deformation of smectic layers and a small value of spontaneous polarization (less than 50 nC/cm2). The FLC director is reoriented due to the motion of solitons at the transition to the Maxwellian mechanism of energy dissipation. A theoretical model is proposed for describing the FLC deformation and director reorientation. The frequency and field dependences of the optical response time are studied experimentally for modulation of light transmission, scattering, and phase delay with a high rate. The hysteresis-free nature and smooth dependence of the optical response on the external electric field in the frequency range up to 6 kHz is demonstrated, as well as bistable light scattering with memorization of an optical state for a time exceeding the switching time by up to 6 orders of magnitude. Due to the spatially inhomogeneous light phase delay, the ability of a laser beam to cause interference is effectively suppressed. The fastest FLCs under study are compatible with 3D, FLC on Silicon (FLCoS), and Field Sequential Colors (FSC) technologies.

Light modulation characteristics of a single-polarizer electro-optical cell based on polymer dispersed ferroelectric liquid crystals

2001 ◽  
Vol 28 (5) ◽  
pp. 741-748 ◽  
Author(s):  
V. Ya. Zyryanov ◽  
E. P. Pozhidaev ◽  
S. L. Smorgon ◽  
A. L. Andreev ◽  
D. Ganzke ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Light Modulation ◽  
Optical Cell ◽  
Ferroelectric Liquid Crystals ◽  
Polymer Dispersed

Helical unwinding in polymer-dispersed ferroelectric liquid crystals

1992 ◽  
Vol 3 (5) ◽  
pp. 231-235 ◽  
Author(s):  
Heinz- S. Kitzerow ◽  
Henning Molsen ◽  
Gerd Heppke
Keyword(s):  
Liquid Crystals ◽  
Ferroelectric Liquid Crystals ◽  
Polymer Dispersed

Linear electro‐optic effects in polymer‐dispersed ferroelectric liquid crystals

1992 ◽  
Vol 60 (25) ◽  
pp. 3093-3095 ◽  
Author(s):  
Heinz‐S. Kitzerow ◽  
Henning Molsen ◽  
Gerd Heppke
Keyword(s):  
Liquid Crystals ◽  
Ferroelectric Liquid Crystals ◽  
Electro Optic ◽  
Polymer Dispersed

Deformed Helix Ferroelectric Liquid Crystals with Large Tilt Angles in Optically Addressed Spatial Light Modulators for Dynamical Holography Applications

1997 ◽  
Vol 488 ◽  
Author(s):  
L. A. Beresnev ◽  
W. Haase ◽  
A. P. Onokhov ◽  
W. Dultz ◽  
M. V. Isaev ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Liquid Crystals ◽  
Amorphous Silicon ◽  
Diffraction Efficiency ◽  
Optical Axis ◽  
Polymeric Films ◽  
Spatial Light Modulators ◽  
Ferroelectric Liquid Crystals ◽  
Holographic Image ◽  
Light Modulators

AbstractOptically addressed spatial light modulators (OASLMs) based on deformed helix ferroelectric liquid crystals (DHFLC) with high tilt angles on order of 40° and helical pitches less than 0.2μm were developed. The diffraction efficiency reached the order of 20%. The light induced deviation of the optical axis of the DHFLC layer was measured in sandwich structures consisting of photoconductors and liquid crystals. The photoelectric parameters of photoconductive amorphous silicon carbide a-SiC:H and a photoconductive polymeric films were measured with and without light blocking and reflecting layers. The application of the developed OASLMs in a holographic image corrector was demonstrated.

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